—Your colleague's spoken English is beautiful, Lily．
—It's no wonder．She ____ in the USA for a year as a visiting professor．
| A．worked | B．has worked | C．had worked | D．has been working |
This is _____ best kind of _____ pen you can get here.
| A．the, the | B．the, a | C．the, 不填 | D．a, the |
How strange! These years my birthday always falls _____.
| A．on the Sunday | B．on a Sunday |
| C．on Sunday | D．at a Sunday |
As _____ writer, he was _____ complete failure.
| A．a, a | B．a, the | C．不填，不填 | D．a, 不填 |
This is _________ best kind of _________ pen you can get here.
| A．the, the | B．the, a | C．the, 不填 | D．a, the |
The most important thing about cotton in history is _____ part that it played in _____ Industrial Revolution.
| A．不填；不填 | B．the；不填 | C．the; the | D．a; the |